add support for imported xsd in static wsdl as well as xsd's that import other xsd's

Details

Description

Currently, Spring WS does not seem to have support for serving up xsd's that are imported into static wsdl. There is also no support for xsd's that import other xsd's. Both situations are considered best practices by schema and wsdl designers.

The schemaLocation attribute should be transformed in the same way that the location attribute is transformed for wsdl's today to include the request specific server info depending on where the application is deployed.